Product description

Under the guidance of the concept of "Integrated Well Completion Services", COSL has formed a complete completion tool development, design, manufacturing, sales and service network. At present, COSL has a total of 346 product processing and manufacturing capabilities of various screens, upper completion tools and lower completion tools, as well as its supporting R&D capabilities, meeting the needs of different upper mechanical mining methods, lower gravel packing and simple sand control design, and continuous improvement of tools Ability, and the ability of customers to customize their needs. In terms of manufacturing, we have advanced large-scale CNC processing equipment, a group of professional and technical personnel with modern production management knowledge and processing experience, and the ability to self-research and self-process tools. In terms of technical service capabilities, we have mature completion sand control test capabilities and on-site service teams, which can achieve test support capabilities such as formation sand particle size detection and sand control test evaluation. At the same time, it can meet the simultaneous operation of multiple on-site operation points and have tool on-site service , Gravel packing service, workover service and other service capabilities. Our well completion business has successfully passed ISO9001 and the oil industry’s safety production standardization completion operation implementation specifications, and established a set of QHSE management system suitable for the development of our own well completion business to ensure that we will complete safe, high-quality, and efficient completions. Well products and services are provided to our customers.

Production pipe supporting tools

Technical characteristics of Y-type electric submersible pump production and completion string. Y-type sub-production string and Y-type combined production string are commonly used offshore electric submersible pump artificial lift completion strings. Among them, the Y-type combined mining pipe string is simple in structure and easier to construct. Under the condition that the pressure system and fluidity of each layer are relatively consistent, each layer is produced at the same time. The Y-type sub-production string is suitable for single-layer separate production in multi-layered oil reservoirs. It does not control combined production or controlled combined production, and is generally implemented by steel wire operation. If the oil well has the capability of spouting in the early stage of development, it can also be directly spouted for production. The use of electric submersible pumps to achieve artificial lift oil production has the advantages of large liquid discharge, high wellhead pressure, simple surface equipment, and small footprint. It is the main method of artificial lift in offshore oilfields.

Gas lift production completion string

Technical characteristics

Gas lift production has the characteristics of large liquid production, deep lift, corrosion resistance, and convenient operation and management. It is suitable for high gas-liquid ratio wells, deep wells, sand wells and inclined wells. Gas-lift oil recovery can create a large production pressure difference in the wellbore. It is an ideal liquid extraction method and can be used as a stable process for oilfield development. In addition, the main equipment (compressors, etc.) of the gas lift production process is installed on the ground, which is easy to inspect, repair and maintain. It occupies a small area and is suitable for offshore oil fields.

Gas well production and completion string

Technical characteristics

The gas well production and completion string has a simple structure and uses a recoverable hydraulic setting production packer. In terms of specific tool configuration, it is necessary to consider the corrosion resistance of tool materials (including sealing elements). Generally, special threads with good sealing performance and metal-to-metal sealing (such as FOX, NEW VAM, TS-3SB, HSM-2, etc.) are used. According to production needs, it can be equipped with chemical injection valves, telescopic sub-joints and other tools.

Sand control tool

Technical features of open hole gravel packing system for horizontal wells A set of sand control system suitable for open hole packing of horizontal wells, which can perfectly realize pipe string running, setting, sealing, dropping hands, circulation, filling, pickling and lifting in horizontal wells For each process, the design of the pipe string can maintain the positive pressure on the formation at all times during the operation, effectively protect the stability of the open-hole section, and ensure the smooth completion of the filling operation. • Suitable for 9 5/8” casing +8 1/2” open hole; • Positive circulation running, can transmit large torque, and help to quickly release the resistance in case of resistance; • The top packer has a large internal diameter and is set , Reliable suspension performance, with a two-stage setting mechanism; • A certain load can be applied to the wellbore string during filling to prevent the string from moving and ensure the filling effect; • After the filling is completed, the service tool string is lifted out, and the wellbore is clean and unobstructed. Convenient for follow-up operations; • The overall tool string pressure level reaches 46MPa, and the temperature level is 150℃, which can also meet the requirements of fracturing and filling operations; • Sand control tools can provide API P110, API N80, API L80-9Cr, API L80-13Cr, etc. Various grades of materials meet the requirements of different working environments.

Multi-layer simple sand control system

Technical characteristics

The two casing strings are respectively suitable for multi-layer simple sand control operations in offshore 9 5/8" cased wells and 7" cased wells.

• Provide a complete set of pipe string tool services and personnel services;

• The pressure level of the overall process string reaches 40MPa, and the temperature level is 150℃;

• Sand control tools can provide API P110, API N80, API L80-9Cr, API L80-13Cr and other grades of materials to meet the requirements of different working environments.

One-time multi-layer gravel packing sand control tool

Technical characteristics

The one-time multi-layer gravel packing sand control technology is aimed at simultaneously shooting multiple oil and gas wells in the casing, and each layer needs to be filled with sand control to complete the well. This process can be used to load multi-layer sand control tools and service tools at one time, set and fill layer by layer, and separate the layers by isolation sealing and isolation packers to ensure that the filling liquid will not cross layers. It can realize the gravel packing and sand control operation of multi-layer unequal-distance pay zone by running the string in one time, greatly shortening the completion time.

• It can complete the packing of the packer and the filling of each layer separately in a single well with multiple layers and one pass to improve the operation efficiency;

• Multi-layer sand control tools and service tools are run into the pipe string in one trip;

• The positioning tool locates the filling position to prevent displacement of the pipe string during filling;

• When filling any layer, it is isolated from other layers to prevent leakage of completion fluid;

Wellbore tool string structure

Top packer + pack off sealed cabin + sealed cylinder + upper extension cylinder + filling sliding sleeve + lower extension cylinder + positioning coupling + screen, blind pipe + isolation packer + upper extension cylinder + filling sliding sleeve + lower extension cylinder +Positioning coupling + screen, blind pipe (repeatedly isolate the packer to the screen blind pipe part according to the number of layers) + snap latch insertion seal + grit packer, etc. In addition to the LTC casing buckle, the connection between the tools is also generally used for ACME thread connection, which has high connection strength; the end face positioning between the tools is generally positioned by the inclined plane, which has the effect of preventing tool rotation and auxiliary sealing.

The service tool column structure is

Setting tool+pack off+4”& 2-7/84” flushing pipe+middle seal+filling tool GP Tool+MARS valve+load indicator+sliding sleeve single closing tool+sliding sleeve switch tool+bottom sealing, etc. The connection between the tools is mostly in the form of flat buckle + O-ring, which reduces the wall thickness and increases the inner diameter, and the connection strength is high; the end face positioning between the tools is generally positioned by the inclined plane, which has the effect of preventing tool rotation and auxiliary sealing.

Thermal recovery completion tool

The technical characteristics of the high-efficiency heat insulation and staged balanced heat injection process for heavy oil thermal recovery wells and the core tools are mainly used for steam stimulation, displacement, and SAGD processes in heavy oil thermal recovery wells, which can achieve high-efficiency thermal insulation and multi-layered wellbore Layered heat injection and uniform heat injection in horizontal wells; effectively improve the heat injection effect of thermal recovery wells and the degree of production of oil layers. The key supporting tools include heat insulation type compensator, heat injection packer, heat insulation type centralizer, segmented packer sealer, equalizing heat injection valve, layered packer sealer, etc. • The overall thermal insulation performance of the pipe string reaches Class D and above; • The matching downhole tool has a thermal insulation function; • The coupling of the matching insulated tubing has good thermal insulation performance; • The temperature of the pipe string is 350℃; • Yes Perform layered heat injection; • Evenly inject heat in horizontal wells.

Pollution prevention process pipe string and core tools for heavy oil thermal recovery wells

Technical characteristics

is used in thermal production wells. During the alternate process of heat injection and oil production, the killing operation is not required when replacing the tubing string to avoid the pollution and cold damage caused by the killing fluid to the formation and reduce the problem of the production effect. The key supporting tools are thermal recovery suspension sealer, thermal recovery downhole switch, and intubation sealer.

Ground service

can provide customers with integrated services from program design, tool development and manufacturing, tool material preparation to on-site technical services, and has an on-site service team with rich on-site operation experience and high-level professional quality.

Sand Control Pump Service

20 sets of sand control equipment, including 5 sets of fracturing equipment and 6 sets of gravel packing equipment. There are currently 2 teams of ground pumping suits with a total of 60 people.

Equipment Specifications

DE filtering service

DE filter is designed as a skid-mounted type, which can be used in offshore and land operating environments, and can filter completion fluid, workover fluid, seawater and other media. Equipped with corresponding operating system, anti-collision frame and slings that meet the requirements of the scope of use. At the same time, a separate mixing tank is used for mixing and adding filter additives. The mixing tank is equipped with two pneumatic diaphragm pumps and pneumatic agitators.